Maggie = マーギ
This = コレ ("This" is usually not writen in katakana.)
hiragana katakana and kanji and furigana which is a mix of hiragana and katakana
シマ
You'd write it in katakana: ジョ
You'd write it in katakana: ジェニ
In Katakana "サブタイトル”
It is written アニメ
ジュース (juusu)
Kimberly = キームバリ
In katakana, "Kay" would be spelled ケィ
Gert = ガート
エスメラルダ (esumeraruda)